org.eclipse.e4.ui.workbench.swt.internal.copy.ViewLabelProvider.java Source code

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Here is the source code for org.eclipse.e4.ui.workbench.swt.internal.copy.ViewLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2000, 2010 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Benjamin Muskalla  - bug 77710
 *******************************************************************************/
package org.eclipse.e4.ui.workbench.swt.internal.copy;

import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.ui.model.application.descriptor.basic.MPartDescriptor;
import org.eclipse.e4.ui.workbench.IResourceUtilities;
import org.eclipse.e4.ui.workbench.swt.util.ISWTResourceUtilities;
import org.eclipse.emf.common.util.URI;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Image;
import org.osgi.framework.Bundle;

/**
 * Based on org.eclipse.ui.internal.dialogs.ViewLabelProvider.
 */
public class ViewLabelProvider extends ColumnLabelProvider {

    /**
     * Image descriptor for enabled clear button.
     */
    private static final String FOLDER_ICON = "org.eclipse.e4.descriptor.folder"; //$NON-NLS-1$

    /**
     * Get image descriptors for the clear button.
     */
    static {
        Bundle bundle = org.eclipse.e4.ui.internal.workbench.swt.WorkbenchSWTActivator.getDefault().getBundle();
        IPath path = new Path("$nl$/icons/full/obj16/fldr_obj.gif");
        URL url = FileLocator.find(bundle, path, null);
        ImageDescriptor enabledDesc = ImageDescriptor.createFromURL(url);
        if (enabledDesc != null)
            JFaceResources.getImageRegistry().put(FOLDER_ICON, enabledDesc);
    }

    private Map<String, Image> imageMap = new HashMap<String, Image>();

    private IEclipseContext context;

    /**
     * @param window
     *            the workbench window
     * @param dimmedForeground
     *            the dimmed foreground color to use for views that are already
     *            open
     */
    public ViewLabelProvider(IEclipseContext context) {
        this.context = context;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
     */
    public void dispose() {
        for (Image image : imageMap.values()) {
            image.dispose();
        }
        super.dispose();
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
     */
    public Image getImage(Object element) {
        if (element instanceof MPartDescriptor) {
            String iconURI = ((MPartDescriptor) element).getIconURI();
            if (iconURI != null && iconURI.length() > 0) {
                Image image = imageMap.get(iconURI);
                if (image == null) {
                    ISWTResourceUtilities resUtils = (ISWTResourceUtilities) context
                            .get(IResourceUtilities.class.getName());
                    image = resUtils.imageDescriptorFromURI(URI.createURI(iconURI)).createImage();
                    imageMap.put(iconURI, image);
                }
                return image;
            }
            return null;
        } else if (element instanceof String) {
            Image image = imageMap.get(FOLDER_ICON);
            if (image == null) {
                image = JFaceResources.getImageRegistry().getDescriptor(FOLDER_ICON).createImage();
                imageMap.put(FOLDER_ICON, image);
            }
            return image;
        }
        return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
     */
    public String getText(Object element) {
        String label = WorkbenchSWTMessages.ViewLabel_unknown;
        if (element instanceof String) {
            label = (String) element;
        } else if (element instanceof MPartDescriptor) {
            label = ((MPartDescriptor) element).getLocalizedLabel();
        }
        return label;
    }

    public Color getBackground(Object element) {
        return null;
    }

}